Implemented by subclasses to scroll the receiver up (or forward) one page in its scroll view, also moving the insertion point to the top of the newly displayed page.
Original signature is '- (void)pageUp:(id)sender'
Available in Mac OS X v10.0 and later.
- sender (Id)
- Typically the object that invoked this method.
- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)